If the Commissioner is of the opinion that the collection of any tax or any amount of tax required to be collected and paid under this chapter will be jeopardized by delay, he shall make an assessment of the tax or amount of tax required to be collected and shall mail or issue a notice of such assessment to the taxpayer together with a demand for immediate payment of the tax or of the deficiency in tax declared to be in jeopardy including penalties. In the case of a tax for a current period, the Commissioner may declare the taxable period of the taxpayer immediately terminated and shall cause notice of such finding and declaration to be mailed or issued to the taxpayer together with a demand for immediate payment of the tax based on the period declared terminated and such tax shall be immediately due and payable, whether or not the time otherwise allowed by law for filing a return and paying the tax has expired. Assessments provided for in this section shall become immediately due and payable, and if any such tax, penalty, or interest is not paid upon demand of the Commissioner, he shall proceed to collect the same by legal process, or, in his discretion, he may require the taxpayer to file such bond as in his judgment may be sufficient to protect the interest of the Commonwealth.